Apparatus for truing grinding-disks.



No. 819-384. V PATENTED MAY 1, 1906.

J. A. STANSBURY. APPARATUS FOR TRUING GRINDING DISKS.

APPLICATION FILED NOV. 18. 1905.

2 SHEETS-SHEET 1.

Afloruey No. 819,384. PATENTED MAY 1, 1906.

' J. A. STANSBURY.

APPARATUS FOR TRUING GRINDING DISKS.

APPLICATION FILED NOV. 18, 1905.

.2 SHEETS-SHEET 2.

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"mun" \llmn llin llmmmlm Al/omey UNITED STATES JOSEPH A. YSTA'NSBIIRY, '01; Los AN ELES, oanirosm. APPARATUS ron rnume. enmbme-olsks.

' I Specification of Letters Patent.

' Eatented May 1, 1906.

Ofiginal'applioation filed one 6, 1905, Serial No. 263,998. Divided and'this application filed lloveinber 1-8, 1905.- Serial No. 288,022;

T0 0 whom it may, concern:

. 1 'Be it known that I, J osEPH-A. STANSBURY, a citizen of the United States, residin at Los Angele's, in the county of Los Ange es and State of California, have invented certain i new and useful Improvements in Apparatus for Truing declare the following exact description 0 y will enable others skilled in the art to which Grinding-Disks; and I do herebyto be a full, clear, and

' it appertains to make and use the same, ref- Serial No. 263 998, which truing' the edges of grinding-Y 151a,;

erence being had to the accompanying drawings, and to the letters of-reference marked l thereon, which form a part of this specification.

im rovements in mechanism adapted espe,

for sharpening the edges ofbeet s knives as covered by my allowed application,

trated in the drawings forminga part-of said application, andtfrom which itfhas been di-- v1 ed. v

The invention comprises various details of constructmn and arrangements of; arts,

which will be hereinafter fully describe and then specifically defined in. the appended "claims; p I 1 illustrate myinvention in the accompa parts being shownin section; Fig. 21s a to plan view; Fig. 3'is a sectional view throu v art of the ap aratustaken on line 3 3 of ,ig, 1, details emg illustrat'ed in elevation.

Fig; 4 is a side elevation ofa part of themechthe devices for truing the amsm for feeding edge of the grindin -disk, and-fFi 5 is'an en-. 'larged to plan view of thej'y'o ecarrying the grin g-disk and the ,fdlflhlODd-POiDtS for truing the edge thereof.-

f 1 a Reference now being had to the details of the drawings by letter, A designates a frameworkin which is "mounted a yoke B, having spindle ends B, mounted in suitable bearings in the box 13 of the frame. Depending from the upper portion of said yoke is an apertured lug shaft supports a rocking yoke Y D, ca

inner end pointed and en' aging an indenture as a bearing in the opposite end of the shaft.

the invention, such as the shaft E, and.

This invention relates to new and usefulmechanism is illus eveled edges of the which the vided with a pu ey e, wherebya rota ,whereby a rota movement may be impartd to the shaft a carrying the shaft C, and said oFFIoE, A a

designates a shat mounted in suitable bearings upon the frame ofthe apparatus, and E E designate two complemental segment cylindrical shells, the inner .marginal edges of'which are cut away to form a camgroove intermediate the same. Said shellsections E are ke ed or otherwise fixed to l designates a; lever, theupper end of which is bifurcated, forming arms E which are held to the opposite sides of the yoke D b means of screws E. The

lower end of the ever E carries a lug e, which is. adapted to travel in said irregular-outlined cam-groove formed intermediate the shellsections as the shaft E rotates, whereby said lever E may be given a rocking and also rocking the yoke D, to which said lever is connected, which will im art a tiltmg movement to the \grinding-dmkfor the purpose of alternatel grinding the o' posite knife. The sha disk is mounted is promovement may be imparted to said sha and disk from any source of power. The shaft E "is also provided with a pulley F,

. it! [Referring to. the to plan'view of the draw-- will be seen a p ate 8, which-is-adjustab y mounted upon the yoke D, and mounted upon said plate are the pivotal insS 'to each of which is givotally connecte an angle member S,'and t einner angled end of each of said members 'is adapted tocarry a diamondupon movement point S To the outer arm of each member S is pivotally connected arodS the outer end of each rod being fastened toan arm S*, which is held stationary to theframe of the apparatus, thus holding the member S stationary as .the yoke'carrying' the grindin -disk rocks,

which will bring alternately. st one dia- .mond-point against one beveled edge of the grinding-disk and then the other, thus affording'means for keeping the grinding-disk cut [down to a true edge. Said plate S has a re 1 cess formed therein, and along one of the marginal 'edgesof said recess is a series of rackrrying teeth 8, which are in mesh with the teethof the screws D and D each of which has its a pinion S, journaled to a stub-shaft S.

wheel T, mounted in a yoke T, which is pivo; ally mounted u on the yoke D and rovided with a hand e T Upon the end the shaft upon which the worm-wheel T is mounted is a fixed gear-wheel T which is adapted to be thrown into mesh with a pinion T mounted upon a shaft T, which latter also carries a ratchet-wheel T adaptedto be engaged by a resilientpawl T".

W designates a dog which is pivotally mounted upon a pin W carried by the ears W5 projecting from the frame of the apparatus, and the shouldered portion of said dog is designed to engage the teeth of said ratchetwheel, and as the side of the yoke D to which said resilient pawl T is fixed tilts up one of the teeth of said ratchet-wheel coming against the dog W will cause a partial rotary movement to be imparted to said ratchet-wheel, and a reverse movement of the ratchet-wheel is prevented bysaid resilient pawl T As the outer ends of the rods S have loose connections with the bracket-arms S the inner ends of said rods may have a slight forward movement incident to the feeding forward of the plate.

' regulated, and when it is desired to throw the mechanism out of. gear the lever T may be thrown toward the grinding-disk and the feeding mechanism will be at rest.

In operation the yoke D is given a rocking motion through the medium of the cam E, which rocks the arm E the upper forked end of which is pivotally connected to the yoke D. As the yoke D rocks in one direction the angled member S, which is upon the side of the yoke which tilts up,-will be drawn away from one of the beveled edges of the grinding-disk, whereas the member upon the side of the yoke which tilts down will be forced toward the other beveled edge of the grinding-disk, and as the yoke tilts inthe opposite direction a reverse movement will take place, and the second disk, which is idle in the former tilting movement,will act against the other bevele S l edge of the grindin d.isk, thus serving to keep the grinding e ge true and even. By

means of the gear mechanism as the yoke tilts in one direction toward the ratchetwheel the latter coming in contact with the pivotal dog W will cause the latter to tilt outward; but on the return rocking movement of the yoke one of the teeth of said ratchetwheel en agin the dogwill cause the ratchetwheel to e he d stationary for a moment during the balance of the upward rocking move-v ment of the yoke carrying the same, and through the medium of the gear connections with said ratchet -wheel a sh ht forward movement may be imparted to t e plate carrying the members provided with diamondpoints. This feeding mechanism may be regulated by the pivotal handle T which may be thrown in one direction or the other to cause the worm-wheels to be in or out of ear. g Having thus fully described my invention, What I claim as new, and desire to secure by Letters Patent, is i 1. A device for truing the edge of a grinding-disk comprising, in combinationwith a tilting disk, diamond-points, and means for causing said points to contact alternately with the opposite beveled edges of the disk as the latter tilts, as set forth. 1 I

2. An apparatus for truing the edge of a grindingdisk comprising, in combination with a disk "and means for tilting the same, pivotal members, a diamond-point carried by each of said members, and means for tilting said members, as set forth. Y

3. An apparatus for truing the edge of a grindingdisk comprising, in combination with a disk and means for tilting the same,

pivotal members, a diamond-point carriedby eachof'said members, means for tilting said members, and mechanism for feeding the latter forward, as set forth.

4. An apparatus for truing the cutting.

edge of agrinding-disk comprising a rocking yo e, a grinding-disk tilting with said yoke, pivotal angle members mounted upon said yoke, a diamond-point upon each of said members, a rod pivotally connected to each member and fixed to a part of the frame of the apparatus, as set forth.

5. An apparatus for truing the edge of a grinding-disk comprising a rocking yoke, a disk carried by the forked ends of said yoke and tilting therewith, angle members pivotally mounted upon the yoke, diamond-points mounted upon the inner ends of said members, a rod pivotally connected to each member, the outer end of each rod being fixed to a stationary part'of the frame of the apparatus, and means for feeding said members upon the yoke, as set forth."

.6. An ap aratus for truing the edges of grindin disks comprising a yoke, a lever havin ifurcated ends secured to said yoke, a sha cylindrical segment-shells fixed to said shaft with a cam-groove intermediate their inner ends, a lug 'projectingfrom said lever and adapted to travel in said camgroove whereby the lever and yokemay be rocked, a disk carried by said yoke, diamondpoints carried by said yoke and adapted to altern atel contact with the opposite beveled edges of the disk as the yoke rocks, aslset forth.

slide, a diamond-point carried by each member, rods pivotally connected one to each of slide, as set forth.

8. A device for truing the-edge of a grinding-disk comprising arocking yoke, a disk carried thereby, a slide mounted upon said yoke, pivotal members mountedupon said slide, a diamond-point carried by each memher, rods ivotall connected one to'each of said'meml ie rs an fixed each to the frame of the apparatus, a series of'rack-teeth along the inner marginal edge of said slide, a shaft, pinion-wheel fixed thereto and in engagement with said teeth,- 'and gear mechanism for rotating said shaft, as set forth.

9. A device for truing the edge of a grind ing-disk com rising a rocking yoke, a disk carried there y, a slide mountedupon'said yoke, pivotal members mounted upon said slide, adiamond-point carried by each member, rods ivotall connected one to each of said members an ing with said worm-Wheel T and in mesh fixed each to the frame of theapparatus, a series of rack-teeth along with said ratchet-teeth, a gear-Wheel mounted upon said yoke T, a counter-shaft mounted upon the yoke D, av gear-wheel upon said counter-shaft in mesh .with said gear-Wheel upon the yoke T a ratchet-Wheel upon said counter-shaft, a pivotal pawl mo unted upon the frame of the apparatus and in the path of the teeth of said ratchet-Wheel, wher'ebyas the yoke carrying the ratchet-wheel tilts upward, a partial rotary movement will be imparted to the ratchet-wheel and, through the gearmechanism described, to impart a movement to said slide, asset forth.

10. An apparatus for truing the edge of a grindingdisk comprising, in combination with a rocking yoke, a disk carried thereby, a

movable slide, pivotal members mounted' u on said slide, a diamond-point upon each of said members, and means for im arting alrll intermittent movement to said s 'de-as t 6 forth.

In testimony whereof I hereunto affix my signature in the resence of two Witnesses.

' JO EPH A. STANSBURY. Witnesses:

NEWTON. T. KIRK, INEZ M. PEoK. 

